// Configure the mock to throw DcerpcException when unwrap is called
        doThrow(new DcerpcException("Test unwrap exception")).when(dcerpcSecurityProvider).unwrap(mockNdrBuffer);

        // Assert that calling unwrap throws DcerpcException
        assertThrows(DcerpcException.class, () -> dcerpcSecurityProvider.unwrap(mockNdrBuffer));

        // Verify that the unwrap method was called exactly once

        when(smbTree.unwrap(CustomSmbTree.class)).thenReturn(null);

        CustomSmbTree result = smbTree.unwrap(CustomSmbTree.class);

        assertEquals(null, result, "Should return null when type cannot be unwrapped");
        verify(smbTree).unwrap(CustomSmbTree.class);
    }

    /**
     * Test for unwrap() method throwing exception.
     * Verifies that unwrap can throw exceptions when appropriate.
     */
    @Test

        jcifs.SID mockSid2 = mock(jcifs.SID.class);
        jcifs.SID mockSid3 = mock(jcifs.SID.class);
        when(mockSid1.unwrap(sid_t.class)).thenReturn(mockSidT);
        when(mockSid2.unwrap(sid_t.class)).thenReturn(mockSidT);
        when(mockSid3.unwrap(sid_t.class)).thenReturn(mockSidT);
        testSids = new jcifs.SID[] { mockSid1, mockSid2, mockSid3 };

        // Act

     */
    boolean isStale();

    /**
     * Unwraps this handle to the specified type.
     *
     * @param <T> the type to unwrap to
     * @param type the class of the type to unwrap to
     * @return unwrapped instance
     */
    <T extends SmbPipeHandle> T unwrap(Class<T> type);

                assertTrue(SmbSession.class.isAssignableFrom((Class<?>) unwrapMethod.getReturnType()),
                        "unwrap method should return SmbSession or subtype");
            }, "unwrap(Class) method should be properly defined");
        }

        @Test
        @DisplayName("Should handle unwrap with SmbSession type")

 * @author mbechler
 *
 */
public interface SmbTree extends AutoCloseable {

    /**
     * Unwraps the tree instance to the specified type
     * @param <T> the target tree type
     * @param type the class of the tree type to unwrap to
     * @return tree instance with the given type
     */
    <T extends SmbTree> T unwrap(Class<T> type);

    /**
     * {@inheritDoc}
     *
     * @see java.lang.AutoCloseable#close()

        verify(tree).send(request, param);
    }

    @Test
    @DisplayName("unwrap and close are available via SmbTree")
    void unwrap_and_close_interactions() {
        // Arrange
        when(tree.unwrap(SmbTreeInternal.class)).thenReturn(tree);

        // Act
        SmbTree unwrapped = tree.unwrap(SmbTreeInternal.class);
        tree.close();

        // Assert
        assertNotNull(unwrapped);

        target = new SmbPipeHandleImpl(pipe);
    }

    @Test
    @DisplayName("unwrap returns self for assignable type; throws for incompatible and null")
    void testUnwrap() {
        // Happy path: unwrap to concrete type
        SmbPipeHandleImpl unwrapped = target.unwrap(SmbPipeHandleImpl.class);
        assertSame(target, unwrapped);

        // Incompatible type: expect ClassCastException

            assertSame(mockSmbPipeHandleInternal, unwrapped, "Unwrap should return the underlying handle implementation.");
        }

        /**
         * Verifies that unwrap returns null if the requested type is not available.
         */
        @Test
        public void testUnwrap_ReturnsNullForUnsupportedType() {

        // Act & Assert
        // unwrap to interface itself should return same instance
        CredentialsInternal unwrapped = creds.unwrap(CredentialsInternal.class);
        assertNotNull(unwrapped, "unwrap to CredentialsInternal returns instance");
        assertSame(creds, unwrapped, "unwrap returns the same object instance");